There is something really pretentious about releasing an album under a fake identity like Beyonce's upcoming Sasha Fierce project. But Sasha Fierce only scores about a 3 on the "I'm a douchebag scale". Remember Garth Brook's gay alter ego, Chris Gaines? That's about a 9.5.
I do like it when comedians do this. Call it a double standard, but it's funny and entirely un-douchey. Blue Brothers, Spinal Tap, Tony Clifton, Borat, Vincent Laguardia Gambini; I enjoyed them all.